Inferior vena cava

Definition

The inferior vena cava is a large vein that carries deoxygenated blood from the lower half of the body to the heart. It plays a critical role in maintaining proper circulation and systemic venous return.

5 Must Know Facts For Your Next Test

1. The inferior vena cava is formed by the union of the left and right common iliac veins.
2. It empties into the right atrium of the heart.
3. It transports blood from regions below the diaphragm, including the legs, back, abdomen, and pelvis.
4. Blockage or dysfunction of the inferior vena cava can lead to serious medical conditions such as deep vein thrombosis (DVT).
5. The inferior vena cava is crucial for returning blood to be re-oxygenated in the lungs.

Review Questions

• What regions of the body does the inferior vena cava drain blood from?
• Into which chamber of the heart does the inferior vena cava empty?
• What can happen if there is a blockage in the inferior vena cava?

Related terms

superior vena cava: A large vein that carries deoxygenated blood from the upper half of the body to the heart.

right atrium: The upper right chamber of the heart where deoxygenated blood from both superior and inferior vena cavae is received.

deep vein thrombosis (DVT): A condition involving a blood clot in a deep vein, often in the legs, which can cause complications if it blocks veins like the inferior vena cava.